Microfluidic device

A microfluidic device comprising:

• a pump unit including a first joint surface, a pumping mechanism and a first channel that connects to the pumping mechanism and opens to the first joint surface;
• a channel unit including a second joint surface and a second channel opening to the second joint surface;
• and
• a sheet-like member including a third joint surface to be bonded to the first joint surface, a fourth joint surface to be bonded to the second joint surface and a connection hole for connecting the first channel and the second channel,
• wherein the sheet-like member is made from an elastic material having a self-sealing feature and is detachably joined to at least one of the channel unit and the pump unit.

A pump unit used for a microfluidic device including the pump unit and a channel unit that has a joint surface and a channel opening to the joint surface, the pump unit comprising:

• a first joint surface for being detachably joined to the joint surface of the channel unit;
• a pumping mechanism;
• and
• a channel that connects to the pumping mechanism, opens to the first joint surface and is connectable to the channel of the channel unit,
• wherein a material constituting the first joint surface is an elastic material having a self-sealing feature.

A channel unit used for a microfluidic device including the channel unit and a pump unit that has a pumping mechanism, a joint surface and a channel opening to the joint surface, the channel unit comprising:

• a second joint surface for being detachably joined to the joint surface of the pump unit:
• and
• a channel that opens to the second joint surface and is connectable to the channel of the pump unit,
• wherein a material constituting the second joint surface is an elastic material having a self-sealing feature.